BRAINCAKEProphase
1. Chromatin fibres condense and supercoil to form chromosomes. The chromosomes become visible under a light microscope.
2. Cylindrical bundles of proteins called the centrioles move to either end of the cell.
3. The nucleolus disappears and the nuclear membrane disintegrates.
Sign in free to see the rest of this lesson, the R.E.C.I.P.E. recall steps and the quiz
BrainCake is free. Make an account in seconds and pick up where this page stops.
Key terms in this lesson
- nucleolus
- A spherical structure within the nucleus where ribosomal RNA is made and combined with protein to form ribosomes.
- centriole
- A structure made of microtubules that organises the spindle fibres during cell division.
- chromatin
- The complex of DNA loosely coiled around histone proteins found in the nucleus between cell divisions.
- centromere
- The region of a chromosome that joins two sister chromatids together and attaches to the spindle fibres.
More in Cell Division
All 31 lessons in Cell Division · All OCR AS-level Biology topics